Roundabout rules

It might be worthwhile to remind people of the rules for use of a roundabout or rotary.

The vehicles in the rotary have right of way over those entering the rotary. Having rear-ended a police car in Boston at a rotary, I won’t forget the rule. Oh yes, the policeman apologized to me because he remembered the law and jammed on his brakes at the last minute. No one was hurt.